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https://ptsldigital.ukm.my/jspui/handle/123456789/457455| Title: | The effect of different framework designs in the failure of fiber reinforced composite fixed dental prosthesis |
| Authors: | Ang Yee (P91339) |
| Supervisor: | Norziha Yahaya, Dr. |
| Keywords: | Dental Prosthesis Composite Resins Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia |
| Issue Date: | 18-Aug-2020 |
| Description: | Framework design could play a role in the various mode of failures in fiber reinforced composite fixed dental prosthesis (FRC-FDP). The most common failures seen was the delamination of external composite of the pontic. The aim of this in-vitro research was to investigate the effect of different framework designs on the failure of FRCFDPs by determining the load and the time of initial failure; followed by a repair protocol to determine post crack performance of the framework with the highest failure load. Thirty FRC-FDPs replacing a mandibular second premolar were fabricated. Three designs were evaluated: Group A, two horizontal FRCs topped with one perpendicularly placed short FRC; Group B, modified Group A design with the short FRC placed between the two horizontal FRCs; Group C, two horizontal FRCs encircled by a parallelly placed short FRC. All samples were subjected to static loading test from the occlusal direction (v=1mm/min) using Universal Testing Machine and acoustic emission analysis was performed concurrently. Statistically analyzed data showed significant differences between the three designs (p<0.001) where Group A exhibited the highest initial failure load (568.56±113.20N). As for the time of initial failure, a statistical significance between the three groups (p<0.001) was found with Group C having the lowest value (6.60s). Six samples from Group A with failures showing composite delamination were selected for repair with same testing procedures. The initial failures of FRC-FDPs were significantly different after repair (p=0.01). This study concluded that an improved framework design substantially enhanced the performance, however, with limited potential in repairability,Ijazah Doktor Pergigian Klinikal (Pergigian Restoratif) |
| Pages: | 84 |
| Call Number: | WU500.A581e 2020 9 tesis |
| Publisher: | UKM, Kuala Lumpur |
| Appears in Collections: | Faculty of Dentistry / Fakulti Pergigian |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_126749+Source01+Source010.PDF Restricted Access | 2.22 MB | Adobe PDF |  View/Open |
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